Muffler



H. S. POWELL MUFFLER Filed June 6, 1925 June 9, 1925. 1,541,275

ATTORNEY Patented June 9. 1925.

HERBERT SPENCER POWELL, OF NEW HARTFORD, NEW YORK.

MUFFLER.

Application filed June 6,

To all whom it may concern llc it known that I, HERBERT SPENCER POWELL,a citizen of the United States, residing at New Hartford, in the countyof Oneida and State of New York, have invented certain new and usefulImprovements in Mufilers, of which the following is a specification,reference being had therein to the accompanying drawing.

My invention relates to a mufller for explosive engines, and I declarethe following to be a full, clear, concise and exact description thereofsufiicient to enable anyone skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawingsin which like reference characters refer to like parts throughout thespecification.

The object of the invention is to provide a mufiler that willeffectively silence the noise due to the exhaust of the gases comingfrom an internal explosive engine without producing any undesirable highback pressure. Furthermore, the muifier is made of aplurality ofsections,whereby it can be added to or substracted from to adjust themufller to the particular make of engine to which it is desirable toattach it.

Moreover, the knock-down or sectional feature of the. mufller allows aconvenient manner for taking the mufller apart for cleaning out thecarbon deposits that accumulate therein.

The object will be understood byreferring to the drawings, in which:

Fig. 1 is a central longitudinal section of the mufiler, showin parts insection;

Fig. 2 is adetai view of one of the sections employed, the wall beingcut away to show the interior of the section;

Fig. 3 is a perspective detail view of another section employed;

Fig. 4 is a perspective view of still another section employed;

Fig. 5 is a detail perspective view, showing parts in section of a sider used.-

Referring more particu arly to the drawings, the mufiler embodies a headpiece 1 having an internally screw threaded hollow sleeve 2 adapted formounting a pipe 3 that connects with the exhaust port of the engine, notshown. Head piece 1 is equipped with an annular flange 5 forming ashoulder at 6 about which fits the first cup 8. The center part of. thebottom or transverse partition of cup 8 is cut out in order to leave1923. Serial No. 643,771.

a solid or unbroken peripheral flange orannular edge or rim 9 adapted toabsorb the heat from the gasses and to provide a central enlarge-daperture 10 for the passage of said gases to the next adjacent cup 11.

Cup 11 is built similar to cup 8. However, the upper 'free edge of rim12 is enlarged and bent outwardly to form an annular shoulder at 13 forseating the bottom of the next adjacent cup 8. All of the cups arenested thus,,one adjacent the other in order to fit them together in asuitable compact manner.

, The first three cups 8, 11 and 15 are each equipped with a largecentral aperture, as at 10 in cup 8, whereby the first four chambersthus formed are made to serve the purpose of an expansion chamber havinga series of rims 9 adapted to absorb the heat of the gases.

Each of the next four cups 20, 21, 22 and 23 has its bottom ortransverse partition cut away to provide a central aperture and to leavea flange which is severed to form horizontally projecting triangularlyshaped fingers or teeth 25, thereby effecting a star shaped opening inthe center of the bottom. Teeth 25 are adapted to break up and cool theexhaust gases, as said gases come into contact therewith. Moreover,fingers 25 have a tendency to absorb the heat of the gases and toconduct said heat towards the atmosphere. Under this cooling and breakuptreatment, the exhaust gases will pass through these three chambers andthe next one adjacent in the series until said gases come to chamber 26formed by cup 27 The bottom ortransverse partition of cup 27 is equippedwith'a plurality of conical or funnel shaped apertures 28 made bypunching the surface of said bottom 29 of each of these cups downwardly.The purpose of these apertures is to further break up the onward rushingexhaust gases, as

they approach. from chambers formed by cups 20, 21, 22 and 23 nextabove.

The last chamber 30 is closed by a member 31 provided with an outletconductor 32.

Member 31 is equipped with an annularflange 33 adapted to form ashoulder against which the lateral wall 34 rests.

The entire series of cups is held together by a stay rod 35 that extendsthrough the center of the muffler. At one end, stay rod 35 projectsthrough an aperture formed in the centerpart of a spider 36. The threearms 37, 37, 37 of spider 36 are made integral with head piece 1. Theother end of rod 35 projects through a suitable aperture in end member31. Both ends of rod 35 are screw threaded for the reception of nuts 38,38, whereby to lock the entire series of cups and end members together.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:-

1. In a muflier for explosive engines built of a plurality of sections,a chamber for the expansion of the gases, said chamber being equippedwith a plurality of sections having unperforated peripheral flat flangesfor cooling the exhaust gases, said flanges forming central aperturesfor the passage of said gases, said flanges being disposed in alignmentwith each other, whereby the central apertures will provide asubstantially unobstructed passage for said gases, and other sectionsequipped with a plurality of conical shaped apertures, whereby tobreakup and segregate exhaust gases.

2. In a mufller for explosive engines, built of a plurality of sections,two chambers formed in said muflier, one having solid flanges and theother star shaped openings,

whereby to aid in breaking up and coolingv the gases of explosion.

3. In a muffler for explosive engines built of a plurality of sections,compartments formed in said mufller, one of said compartments havingsolid flanges and the other star shaped openings, whereby, to aid inbreaking up and cooling the gases of exploslon.

In testimony whereof I have afiixed my signature.

HERBERT SPENCER POWELL.

